方法不会覆盖android中超类java @override的方法

Question

我正在尝试制作计算器应用程序，但是我因为重写OnClickListner

而收到错误

BtnAdd.setOnClickListener（new View.OnClickListner（）{

           @Override // getting red line here asking method does not override super class 
            public void onClick(View v){
               Toast.makeText(getActivity(), "this is my Toast message!!! =)",
                       Toast.LENGTH_LONG).show();
           }
        });

Answer 1

它不是getActivity getApplicationContext

@Override // getting red line here asking method does not override super class 
public void onClick(View v) {
     Toast.makeText(getApplicationContext(), "this is my Toast message!!! =)",
         Toast.LENGTH_LONG).show();
     }
});